Product Description
The 81.25902.0415 SHACMAN Relay (70A 4-Terminal) is key for SHACMAN trucks' electrical systems. It's a "current switch" that controls high-current circuits (headlights, air conditioners, wipers). It uses small current to trigger, so the main switch doesn't take high current-stops burnout, keeps appliances steady.
Good materials go into it: flame-retardant PA66 shell (UL94 V-0), silver-plated copper contacts (low resistance, high current), high-temp enameled wire coil (120℃ long-term). Handles vibration (10-500Hz), -40℃~120℃ temps, 95% humidity-no shell bend, contact rust, or coil failure. Fits SHACMAN's original electrical system: 4-terminal layout, size, plug match. Swap easy-no wiring/bracket mods, pull old plug, insert new, clip with original fastener. Tested before shipping: contact resistance, insulation, 10k cycles-trustworthy.
Features And Advantages
High current capacity: Silver-plated contacts take 70A steady, 100A instant. Meets high-current appliance needs, no contact overheating.
Tough environment use: Flame-retardant shell stops fire risks. Works -40℃~120℃, resists vibration/humidity-steady in complex conditions.
Fits SHACMAN exactly: Same as original-4 terminals, plug, size. No adapters, saves 25% time vs universal.
Safe & long-lasting: Flame-retardant + low-resistance contacts = less fire/overheating. Coil lasts 100k+ hours, contacts anti-rust-relay lasts 200k+ km.
Application Scope
Only SHACMAN trucks: X3000, M3000, L3000. No FAW/Dongfeng or other models-different voltage (some 12V), terminals, plugs-won't fit.
Basic Parameters
Product Model: 81.25902.0415
Applicable vehicles: SHACMAN (X3000, M3000, L3000)
Type: 70A 4-Terminal electromagnetic relay
Function: Controls high-current circuits (headlights, AC) on-off
Material: PA66 flame-retardant shell; silver-plated copper contacts; high-temp coil
Installation: Direct replacement (matches original plug/clip)
Working conditions: DC 24V; 70A; contact resistance ≤50mΩ; -40℃~120℃; UL94 V-0
FAQ
Q1: Works on 12V SHACMAN?
A1: No-for 24V only. 12V won't trigger the coil.
Q2: Clicks but no current switch?
A2: Check plug tightness. If tight, contacts stuck/rusted-replace relay.
Q3: How often to check?
A3: Every 15k km or 6 months. Check plug, listen for click, test contact resistance.
Q4: Replace 50A relay?
A4: Yes, if terminals/plug match. 70A has extra capacity, less overheating.
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